he is expected to face a barrage of questions about general david petraeus' admitted affair, the time line of the fbi investigation and when exactly the president was told about it. meanwhile, the white house says the president still has faith in general john allen. he, of course, is the current u.s. commander in afghanistan who is now under investigation by the pentagon's inspector general for what officials described as potentially inappropriate e-mails with one of the women directly involved in the case. nbc's chief foreign affairs correspondent andrea mitchell has more on this ever-widening story. >> reporter: the scandal involving two very different women, tampa socialite jill kelley and petraeus biographer paul broadwell ensnared not only petraeus but his successor. john allen who took over from petraeus in afghanistan and is the president's choice to be supreme allied commander of nato forces in europe, a nomination now temporarily on hold. >> sweetheart, thank you for all that you have done for me and for our precious -- >> reporter: the general is married with a sterling reco